Bolster.



c. A. LINDSTRUM.

BOLS TEB. APPLIUATION FILED NOV. 17, 1909.

Patented Mar. 7, 1911.

awuantoz um-41mm THE mmnm Psnms co-, wasrmvarmv, D. c.

CHARLES A. LINDSTEOM, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR T0 PRESSEDSTEEL GAR COMPANY, OF PITTSBURG, PENNSYLVANIA, A CORPORATION OF NEWJERSEY.

BOLSTER.

To all whom it may concern:

Be it known that I, CHARLES A. LIND- s'rno'ii, a citizen of the UnitedStates, residing at Pittsburg, Northside, in the county of Allegheny andState of Pennsylvania, have invented certain new and useful Improvementsin Bolsters, of which the following is a specification.

My invention relates to bolsters for trucks for railway cars, and moreespecially to that class of metallic bolsters which are built up ofsteel plates, pressed to shape and then riveted together.

An advantage of the present invention is to provide a bolster which canbe used in place of a cast steel holster, where hitherto, owing to thepeculiar construction of the trucks, it has frequently been impossibleto use a pressed steel bolster of suilicient strength of the usual type,and so to a certain extent obtain the advantages of both a cast steeland pressed steel bolster.

Another advantage of the present invention is to provide a bolster whichcan be readily applied to different heights of cars with only minorchanges, as for instance, a bolster of a certain capacity may have thecentral portion, which is made of pressed steel, uniform in size andvmaterial for various heights of cars, the only changes neces sary beingan alteration in the ends to suit the required conditions, thus adaptingthe bolster for interchange with bolsters already in use, so that carshaving other forms of bolsters may be repaired with my bolster.

The invention consists in a bolster, the central portion of which ismade of rolled or pressed steel and the end portions of cast material..The outline of the central por tion is somewhat in the term of a troughwith a cover plate, the adjacent members being provided with outwardlyprojecting flanges or portions which are secured together. To theextremities of the trough portion, ends in the form of castings aresecured, forming extensions of the bolster and providing seats for thesprings and the usual column guides.

In the accompanying drawings illustrating my invention, in the severalfigures of which like parts are similarly designated, Figure 1 is a planview of a truck bolster constructed in accordance with my invention;Fig. 2 is a side elevation of the same, one end of the bolster beingshown as a sec- Specification of Letters Patent.

Application filed November 17, 1909.

Patented Mar. 7, 1911.

Serial No. 528,587.

tion on line aa, Fig. 1; Figs. 3, e, 5 and 6 show modifications of theend castings; Fig. 7 is an end elevation of the bolster, and Fig. 8 is asection through one of the end castings 011 line 54 Fig. 1.

The main body of the bolster consists of a trough-shape member 1,preferably deeper at its center than at its ends, and preferably formedof a single plate of steel pressed to shape, although this is notessential as it may be builtup of two side members provided withinwzfidly projecting flanges on the lower edges and the bottom plateriveted to said flanges. In either event, however, a trough-shape memberis formed. The upper edges of this member are provided with 1011-gitudinal outwardly projecting flanges 2. The upper member is a simpleflat plate 3 which is riveted to the flanges 2 so as to close the top ofthe trough-shape member 1.

Side bearings 4: are riveted to the top member and the center plate 5 isalso riveted to said top member, and said top member is provided withhandholes 6 by means of which ready access may be had to the interior ofthe bolster for inserting and removing the rivets by which the sidebearings and end castings are secured to the bolster body.

5 indicates a reinforcing bracket, preferably a malleable castingprovided with a vertical opening 8 for the reception of the king pin.This bracket contacts with the top plate 3 and is riveted to the sidesof the trough-shape member 1 by means of flanges 7.

To each end of the body portion of the bolster a casting 9 is riveted.This casting forms a seat for the springs 10 and is provided with columnguides 11 and also eattensions tor attachment to the ends of the bodyportion of the bolster. These extensions are shaped in such a manner asto fit and be secured to the top, sides and bottom of the bolster body,as follows: The top horizontal portion 11 fits in and is riveted to theunderside of the top member 3; the vertical side portions 12 fit insideand are riveted to the sides of the trough member, and the lower slopingportion 13 fits the upper side of the lower trough member 1 and isriveted thereto.

To accommodate springs 10, the portion of the casting constituting thespring seat is made hollow for the reception of the ends oi.

the springs, and is shown in the drawings as being of greater width thanthe portion engaging with the bolster body, but, if necessary, thiscondition may be reversed and the portion engaging the bolster madewider than the end forming the spring seat.

In Fig. 2, the spring seat portion of the end casting is shown slightlybelow the level of the top of the bolster, and in Fig. 3 still fartherbelow the level of the top of the bolster. In Fig. t it is shown onabout the same level as the top of the bolster: whereas in Figs. 5 and6, the spring seat portion of the end casting is shown in two differentplanes, both of them above the level of the top of the bolster.

It will readily be seen that this range of adaptability, due to theability to apply different forms of end castings, results in theadvantage that this bolster can be readily applied to different heightsof cars, the only change necessary being in the end castings.

Many minor changes in the construction and arrangement of my inventioncan be made and substituted for those herein shown without in the leastdeparting from the nature and principle of my invention, asfor instance,extension of the castings may be made to fit the outer surfaces of thetop, sides and bottom of'the bolster body, and in that manner securedthereto.

Having thus described my invention, the following is what I claim as newtherein and desire to secure by Letters Patent 1. A car bolstercomprising a troughshape body member with top plate, and end extensionssecured to the body member and top plate.

2. A car bolster, comprising a troughshape body member with top plate,and end extensions secured to the body member and top plate to formspring seats.

3. A car bolster, comprising a troughshape body member with top plate,and end extensions secured to the body member and top plate, theextensions having recesses for the reception of the ends of the springs.

4:. A car bolster, comprising a troughshape body member with top plate,and end extensions projecting inside of the body member and top plateand secured thereto'to form spring seats.

A car bolster, comprising a troughshape body member with top plate, andend extensions projecting inside of tlTC body member and securedthereto.

6. A car bolster, comprising a troughshape body member and spring seatextensions projecting inside the trough-shape member.

7. A car bolster comprising a troughshape body member and spring seatextensions projecting inside the trough-shape member and securedthereto.

8. A car bolster, comprising a troughshape body member and endextensions secured inside the ends of the body member.

9. A car bolster, comprising a troughshape body member, and endextensions, se cured inside the ends of the body member to form springseats.

10. A box-girder-like bolster, having its body composed of a lowertrough-like portion deepest at its center and tapering thence toward itsends, and a top portion, these two portions having longitudinal outwardprojections secured together, and end extensions forming spring seats,secured inside the end portions of the body member.

11. A box-girder-like bolster, having its body composed of a lowermember deepest at its center and tapering thence toward its ends, andhaving its upper longitudinal edges flanged or projected outwardly and atop'member also having its lower edges provided with outward lateralflanges or projections, the flanges of the two members being securedtogether. and end-extensions secured inside the end portions of the bodymember, and projecting beyond the ends of the body member to form springseats.

12. A bolster formed substantially as a box-girder and comprising twomembers riveted together, and end extensions secured inside the ends ofthe box-girder member to form spring seats.

13. A pressed-steel-bolster, composed of a trough-like bottom memberdeepest at its center and tapering thence toward its ends, and havinglongitudinal outwardly project ing flanges along the sides of its upperedges, and a top member having complement-a1 lateral projections securedto such flanges, and end extensions secured inside the ends of thebottom and top members to form spring seats.

In testimony whereof I aflix my signature in presence of two witnesses.

CHARLES A. LINDSTRCM \Vitnesses HARRY A. KNIGHT,

G. C. LAMBE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C. l

